JPH10255815A - Winder of wound body for battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly obtain a wound body with high accuracy without loosening it by imparting roll-in frictional resistance by always bringing a resistance imparting means into contact with a peripheral surface of this wound body in the middle when the wound body transfers to a tape sticking mechanism. SOLUTION: After separators 14a and 14b of a wound body 16 are cut through a cutting mechanism, the body 16 rotates in the arrow B direction, and sticking work of a tape 19 is performed. In the middle of this, a roller 46 to constitute a resistance imparting means 44 of a roll-in mechanism 30 is brought into contact with a peripheral surface of the wound body 16. A plate body 48 slidingly contacts with this roller 46, and rotational resistance is imparted to the roller 46. Therefore, the roller 46 can always impart roll-in frictional resistance to the peripheral surface of the body 16. Therefore, when negative electrode lead 18 passes through between the roller 46 and the body 16, even if the negative electrode lead 18 protrudes outside the body 16, the roller 46 neither springs up and rotating speed of the roller 46 nor increases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery winding device for winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween.

[0002]

2. Description of the Related Art Generally, in a battery assembling process, a wound body (electrode group) is formed by winding a strip-shaped positive electrode plate and a negative electrode plate with a separator interposed therebetween, and then forming the wound body. The body is accommodated in the battery can, and an electrolyte is injected into the battery can. Further, a sealing component is inserted into the battery can, and then an operation of caulking the open end of the battery can is performed.

In this case, a winding device is used to integrally wind the positive electrode plate, the negative electrode plate and the separator. In this type of winding device, after a belt-like positive electrode plate and a negative electrode plate are inserted with a separator interposed between a single winding shaft having a slit formed in the diameter direction or a divided winding shaft,
When the winding shaft is rotated, a wound body is obtained around the winding shaft. Next, while the separator is cut, the end of this separator is taped,
The wound body is taken out from the winding shaft.

By the way, various winding devices have been employed to wind the ends of the positive electrode plate and the negative electrode plate and the end of the cut separator around the peripheral surface of the wound body. For example, as shown in FIG. 7, the conventional winding device 2 includes a hard rubber roller 3, and the rubber roller 3 is rotatably supported by one end of the swing arm 4. A tension spring 5 is engaged with the other end of the swing arm 4, and the swing arm 4 is swingably mounted on a base 7 via a fulcrum 6.

[0005] Then, under the action of rotation of the winding shaft 8, the belt-like positive electrode plate 10 and the negative electrode plate 12 are attached to the winding shaft 8 by the separator 1.
Winding is carried out with 4a and 14b interposed, and a wound body 16 is obtained. Next, the rubber roller 3 is pressed against the peripheral surface of the wound body 16 by the movement of the
a and 14b are cut. Furthermore, the end winding of the winding body 16 is performed by rotating the winding shaft 8,
After the end portions of the separators 14a and 14b are taped near the end of the end winding, the winding body 16 is separated from the winding shaft 8.

As shown in FIG. 8, the wound body 16 has a positive electrode lead 17 extending from a substantially central portion on one end side, a negative electrode lead 18 extending from a substantially outer peripheral portion on the other end side, and a terminal end of a separator 14b. Is wound around with a tape 19.

[0007]

However, when the winding body 16 is wound around the winding shaft 8 as described above, the negative electrode plate 1
2, the outer shape of the wound body 16 is deformed since the negative electrode lead 18 provided near the outer periphery of the wound body 16 is present. That is, the portion of the negative electrode lead 18 protrudes outward. For this reason, when the negative electrode lead 18 passes between the rubber roller 3 and the wound body 16 in a state where the peripheral surface of the wound body 16 is pressed by the rubber roller 3, the rubber roller 3 Troubles, such as an increase in the number of revolutions, occur.

When the rubber roller 3 bounces, a gap is generated between the rubber roller 3 and the wound body 16,
The winding body 16 is easily loosened due to the rolling vibration.
On the other hand, when the number of revolutions of the rubber roller 3 increases, when the contact point of the rubber roller 3 shifts from the negative electrode lead 18 to the peripheral surface side of the wound body 16, the separator 14b is pushed out because the peripheral speed of the rubber roller 3 is high. It causes a rolling tremor.

As described above, when the winding body 16 is loosened due to the rolling vibration, the outer diameter of the winding body 16 increases. As a result, the wound body 16 may not be able to be inserted into the battery can, which is a serious problem in battery production. Then, it is conceivable to increase the pressing force of the rubber roller 3 against the winding body 16, but it has been pointed out that excessive bending stress acts on the winding shaft 8 and the winding shaft 8 is easily damaged. I have.

The present invention solves this kind of problem, and enables a wound body in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween to be smooth and highly precise without loosening or the like. It is another object of the present invention to provide a winding device for a battery winding body which can be easily obtained and can be simplified in configuration.

[0011]

In order to solve the above-mentioned problems, in a battery winding device according to the present invention, a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween. After the separator is cut from the obtained wound body, when the wound body rotates on the way to the tape applying mechanism, the resistance applying means is always in contact with the peripheral surface of the wound body for winding. Provides frictional resistance. For this reason, even when the negative electrode lead passes between the resistance applying means and the wound body, a desired tension can always be applied to the separator via the resistance applying means, and the separator is caused by winding vibration. There is no loosening.

[0012] Therefore, it is possible to prevent the outer diameter of the whole wound body from increasing due to loosening of the separator, and to efficiently and smoothly perform the operation of inserting the wound body into the battery can. become. In addition, the structure is simplified, and no excessive load acts on the winding shaft, so that damage to the winding shaft can be effectively avoided.

Further, the resistance applying means includes a roller which is in sliding contact with the peripheral surface of the wound body, and a resistor which is in sliding contact with the roller and imparts rotational resistance to the roller. It is provided with a contacting plate member and a pressing roller that contacts the peripheral surface of the roller and has a hardness different from that of the roller. Therefore, the roller does not bounce off the peripheral surface of the wound body when the negative electrode lead passes, and does not rotate at a peripheral speed higher than the peripheral speed of the wound body. It becomes possible to prevent.

Further, the resistance applying means includes a resistance member, for example, a rod having an R, which comes into sliding contact with the peripheral surface of the wound body, so that the winding vibration of the wound body can be avoided with a very simple configuration. can do.

Furthermore, the resistance applying means includes a synthetic resin roller which is in contact with the peripheral surface of the wound body and has a lower hardness than the wound body. Accordingly, the outer peripheral surface of the roller is deformed when pressed against the peripheral surface of the wound body, and it is possible to reliably apply a desired frictional resistance to the wound body.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic front view of a battery winding device 20 according to a first embodiment of the present invention.

The winding device 20 is a winding mechanism 24 for winding the positive electrode plate 10 and the negative electrode plate 12 around the winding shaft 22 with the separators 14a and 14b interposed therebetween. From the obtained wound body 16, the separators 14a, 1
4b, a winding mechanism 30 for winding the ends of the positive electrode plate 10, the negative electrode plate 12, and the separators 14a and 14b around the peripheral surface of the winding body 16, and a cutting end of the separator 14b. The winding body 16
And a tape sticking mechanism 28 for stopping the tape 19 from being wound around.

The winding mechanism 24 has an index table 32 which rotates in the direction of arrow A at intervals of 90 °. In the index table 32, 4
A winding shaft 22 is provided at a location, and a slit 34 extending in the axial direction is formed in the winding shaft 22. Reel 22
Rotates in the direction of arrow B and is movable back and forth in the axial direction.

At each stop position of the index table 32, an insertion station ST1 in which the band-shaped positive plate 10 and the band-shaped negative plate 12 are inserted into the slit 34 with the separators 14a and 14b interposed therebetween, and a winding shaft 22 indicated by arrows. By rotating in the direction B, the positive electrode plate 10 and the negative electrode plate 1 are rotated.
2 is wound integrally with the separators 14a and 14b to form a winding body 16, and then the end of the separator 14b cut from the winding body 16 is taped to a winding stop station ST2. A quality inspection station ST3 for inspecting the quality of the stopping of the winding body 16,
The winding station 22 is reversed by a predetermined angle, and a take-out station ST4 from which the wound body 16 is taken out.
Are provided. The cutting mechanism 26 includes the separator 14
a and 14b are provided with a pair of opposing cutting blades 36a and 36b for integrally cutting at predetermined positions.

As shown in FIGS. 1 and 2, the tape sticking mechanism 28 is configured to convert a roll tape (not shown) from a tape 19 to a tape.
Is cut at predetermined lengths, and then the winding stop station S
A tape supply member 38 that conveys and positions the tape 19 in accordance with T2, and an end of the tape 19 is attached to the end of the separator 14b by the tape supply member 38, and then the entire tape 19 is wound. And a sticking roller 40 for sticking along the peripheral surface of the body 16. The sticking roller 40 is rotatably mounted on the tip side of the swing arm 42.

When the winding body 16 is rotated during the transition from the cutting mechanism 26 to the tape attaching mechanism 28, the winding mechanism 30 is always in contact with the peripheral surface of the winding body 16 to provide a winding friction resistance. A resistance applying unit 44 is provided. As shown in FIG. 2, the resistance applying means 44 includes a roller 46 slidably in contact with the peripheral surface of the wound body 16, and a plate (resistor) 48 slidably in contact with the roller 46 and applying rotational resistance to the roller 46. And The roller 46 is rotatably supported at an end of the base member 50, and the plate 48 is fixed to the base member 50.

The operation of the winding device 20 according to the first embodiment configured as described above will be described below.

First, as shown in FIG. 1, in the reel mechanism 24, the reel 22 arranged at the insertion station ST1 is rotated.
The separators 14a and 14b are inserted into the slit 34, and the positive electrode plate 10 and the negative electrode plate 12 are arranged in an insulated state by the separators 14a and 14b. At this time, the positive electrode plate 10 and the negative electrode plate 12 are cut to a predetermined length.

Therefore, while the winding shaft 22 is rotating in the direction of arrow B, the index table 32 is turned 90 ° in the direction of arrow A.
Only rotate. For this reason, the stop station ST2
Then, the positive electrode plate 10 and the negative electrode plate 12
The wound body 16 is obtained by being wound with a and 14b interposed therebetween. Next, the separators 14a and 14b are cut via the cutting blades 36a and 36b constituting the cutting mechanism 26 (see (a) in FIG. 3). Here, the roller 46 constituting the winding mechanism 30 is in sliding contact with the outer peripheral surface of the wound body 16.

Next, when the winding shaft 22 rotates in the direction of arrow B, the ends of the positive electrode plate 10 and the negative electrode plate 12 are cut on the peripheral surface of the winding body 16 by the cut separators 14a, 14a.
It is rolled integrally with the end of b (see (b) in FIG. 3). At this time, in the tape attaching mechanism 28, a tape 19 cut to a predetermined length from a roll tape (not shown) is used.
Are arranged corresponding to the winding stop station ST2 while being held by the tape supply member 38, while the application roller 40 is in sliding contact with the peripheral surface of the wound body 16.

When the winding body 16 rotates integrally with the winding shaft 22 in the direction of arrow B, and the end of the separator 14b passes through the roller 46 and reaches a position corresponding to the tape 19, the tape supply member 38 is turned on. As shown in FIG. 3, (c), the tape 19 is moved to the winding body 16 side and the tape 19 is partially attached to the end of the separator 14b. Since the wound body 16 further rotates in the direction of arrow B, the tape 19
When the tape 19 passes between the roller 6 and the attaching roller 40, the entire tape 19 is attached to the peripheral surface of the wound body 16 (see (d) in FIG. 3).

Wound body 1 on which entire tape 19 is stuck
6 indicates that the index table 32 is 90 ° in the direction of arrow A.
By being rotated, it is arranged at the pass / fail inspection station ST3, and the stopped state of the wound body 16 is inspected.
The wound body 16 on which this inspection has been performed is conveyed to the take-out station ST <b> 4, arranged at a predetermined angular posture, and taken out of the index table 32.

In this case, in the first embodiment, after the separators 14a and 14b of the wound body 16 are cut via the cutting mechanism 26 at the winding stop station ST2,
When the winding body 16 rotates in the direction of arrow B to perform the operation of attaching the tape 19, the roller 46 constituting the resistance applying means 44 of the winding mechanism 30 comes into contact with the peripheral surface of the winding body 16. A plate 48 slides on the roller 46, and a rotational resistance is applied to the roller 46.

Therefore, the roller 46 can always apply the winding frictional resistance to the peripheral surface of the wound body 16. For this reason, when the negative electrode lead 18 passes between the roller 46 and the wound body 16, even if the negative electrode lead 18 protrudes outside the wound body 16, The rotation speed of 46 does not increase.

Thus, in the first embodiment, it is possible to apply a desired tension to the separator 14b via the roller 46 even when the negative electrode lead 18 passes, and the separator 14b An effect is obtained that the occurrence of looseness or the like can be reliably prevented.

Further, as described above, the separator 14b
Since the outer diameter of the entire wound body 16 does not increase due to the looseness of the battery, the operation of inserting the wound body 16 into a battery can (not shown) can be efficiently and smoothly performed. Will be possible. Further, the resistance applying means 44 substantially only includes the roller 46 and the plate body 48 slidably contacting the roller 46, and the overall configuration of the winding mechanism 30 is simplified. Further, no excessive load acts on the winding shaft 22, and it is possible to effectively prevent the winding shaft 22 from being damaged.

FIG. 4 is a schematic front explanatory view of a winding mechanism 60 constituting a winding device according to a second embodiment of the present invention. Note that the same components as those of the winding mechanism 30 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The winding mechanism 60 includes a resistance applying means 62. The resistance applying means 62 is provided with a roller 64 which is in sliding contact with the peripheral surface of the wound body 16, and which is in contact with the peripheral surface of the roller 64 and which is provided with the roller 64. And a pressure roller (resistor) 66 having a different hardness, for example, a lower hardness. The roller 64 and the pressing roller 66 are rotatably supported by an end of a base member 68, and the pressing roller 66 is
4 can be adjusted in position.

In the second embodiment configured as described above, the pressing roller 66 having a different hardness is in contact with the peripheral surface of the roller 64, and a rotational load is constantly applied to the roller 64. Therefore, as in the first embodiment, even if the negative electrode lead 18 passes through the roller 64, the roller
Without bouncing from the outside or rotating at a peripheral speed different from the peripheral speed of the wound body 16, it is possible to reliably prevent the occurrence of winding vibration.

FIG. 5 is a schematic front explanatory view of a winding mechanism 80 constituting a winding device according to a third embodiment of the present invention. Note that the same components as those of the winding mechanism 30 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The winding mechanism 80 includes a resistance applying means 82, and the resistance applying means 82 includes a rod (resistance member) 84 slidably contacting the peripheral surface of the wound body 16. This rod 84
Is formed of resin or metal, and an R surface 86 is provided at a portion where the winding body 16 is in contact.

In the third embodiment configured as described above, since the R surface 86 of the rod 84 is in contact with the peripheral surface of the wound body 16, the wound body 16 is always in contact with the winding friction. Resistance is applied. Therefore, since a predetermined tension is applied to the separator 14b, the separator 14b is not loosened. Thereby, the diameter of the winding body 16 does not increase, and the same effect as in the first embodiment can be obtained.

FIG. 6 is a schematic front explanatory view of a winding mechanism 100 constituting a winding device according to a fourth embodiment of the present invention. In addition, the winding mechanism 30 according to the first embodiment
The same components as those described above are denoted by the same reference numerals, and a detailed description thereof will be omitted.

The winding mechanism 100 includes the resistance applying means 10
The resistance applying means 102 includes a synthetic resin roller 104 which is in sliding contact with the peripheral surface of the wound body 16 and has a lower hardness than the wound body 16.

In the fourth embodiment configured as described above, since the synthetic resin roller 104 having a lower hardness than the wound body 16 comes into contact with the peripheral surface of the wound body 16, In addition, it is possible to always provide a frictional resistance for entrainment. Therefore, it is possible to effectively prevent the winding body 16 from becoming loose with a simple configuration.
The same effect as that of the embodiment can be obtained.

[0041]

As described above, in the battery winding apparatus according to the present invention, when the winding body is rotated on the way to the tape attaching mechanism, the resistance applying means is connected to the winding body. In order to apply the frictional resistance for winding by always contacting the peripheral surface of the member, even when the negative electrode lead passes between the resistance applying means and the wound body, a desired tension is applied to the separator via the resistance applying means. Can always be given. This allows
To prevent the separator from being loosened due to rolling vibration and prevent the outer diameter of the whole winding from becoming large, and to efficiently and smoothly insert this winding into the battery can. Becomes possible. In addition, the structure is simplified, and no excessive load acts on the winding shaft, so that damage to the winding shaft can be effectively avoided.

[Brief description of the drawings]

FIG. 1 is a schematic front explanatory view of a winding device for a battery winding body according to a first embodiment of the present invention.

FIG. 2 is an explanatory front view of a main part of a winding mechanism constituting the winding device.

FIG. 3 is an operation explanatory view of the winding mechanism.

FIG. 4 is a schematic front view of a main part of a winding device for a battery winding body according to a second embodiment of the present invention.

FIG. 5 is a schematic front view of a main part of a winding device for a battery winding body according to a third embodiment of the present invention.

FIG. 6 is a schematic front view showing a main part of a winding device for a battery winding body according to a fourth embodiment of the present invention.

FIG. 7 is a schematic front explanatory view of a main part of a winding device according to a conventional technique.

FIG. 8 is an explanatory perspective view of a wound body for a battery.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Positive electrode plate 12 ... Negative electrode plate 14a, 14b ... Separator 16 ... Wound body 17 ... Positive electrode lead 18 ... Negative electrode lead 20 ... Winding device 22 ... Wound shaft 24 ... Wound shaft mechanism 26 ... Cutting mechanism 28 ... Tape attaching mechanism 30 , 60, 80, 1
00: winding mechanism 32: index table 38: tape supply member 40: sticking roller 44, 62, 82, 1
02 ... resistance applying means 46, 64, 104 ... roller 48 ... plate 66 ... pressing roller 84 ... rod 86 ... R surface

Claims (6)

[Claims] 1. A winding mechanism for winding a positive electrode plate and a negative electrode plate around a winding shaft with a separator interposed therebetween, and cutting the separator from a wound body obtained by being wound by the winding shaft mechanism. A cutting mechanism, a winding mechanism for winding the ends of the positive electrode plate, the negative electrode plate and the separator around the peripheral surface of the winding body, and a tape fixing the end of the separator to the peripheral surface of the winding body. A tape sticking mechanism, wherein the winding mechanism is always in contact with the peripheral surface of the wound body when the wound body rotates on the way from the cutting mechanism to the tape sticking mechanism, and the winding friction is included. A winding device for a wound body for a battery, comprising a resistance applying means for applying resistance. 2. A winding device according to claim 1, wherein said resistance applying means includes: a roller which slides on a peripheral surface of said winding body; and a resistor which slides on said roller to apply rotation resistance to said roller. A winding device for a wound body for a battery, comprising: 3. The winding device according to claim 2, wherein the resistor is a plate material that contacts a peripheral surface of the roller. 4. The battery winding body according to claim 2, wherein the resistor is a pressing roller that contacts a peripheral surface of the roller and has a hardness different from that of the roller. Winding device. 5. The battery winding device according to claim 1, wherein said resistance applying means includes a resistance member which slides on a peripheral surface of said winding body. 6. The winding device according to claim 1, wherein the resistance applying means contacts a peripheral surface of the wound body,
A winding device for a battery winding body, comprising: a synthetic resin roller having a lower hardness than the winding body.